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Finding the Fourth Proportional to 395,272.45, 545,471.44 and 213,980.39

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Solution

The fourth proportional to 395,272.45, 545,471.44 and 213,980.39 is: 295,290.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,272.45 : 545,471.44 = 213,980.39 : x
  2. Step 2: Convert to fraction form
    395,272.45/545,471.44 = 213,980.39/x
  3. Step 3: Cross multiply
    395,272.45x = 545,471.44 × 213,980.39
  4. Step 4: Simplify right side
    395,272.45x = 116,720,191,465.06
  5. Step 5: Solve for x
    x = 116,720,191,465.06/395,272.45
  6. Step 6: Final answer
    x = 295,290.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.